#!/bin/bash

# USAGE: create_nextjs_app [app_name]

APP_NAME=$1
TEMPLATE_DIR="/opt/.manus/deploy/templates/next"

# Check for help flag or missing argument
if [ "$1" == "--help" ] || [ "$1" == "-h" ] || [ -z "$1" ] || [ "$1" == "." ]; then
  echo "Creates a new Next.js application configured for Cloudflare Workers from template"
  echo
  echo "USAGE:"
  echo "  create_nextjs_app [app_name]"
  echo
  echo "ARGUMENTS:"
  echo "  app_name    Name of the Next.js application to create"
  echo
  echo "EXAMPLE:"
  echo "  create_nextjs_app my_app"
  exit 1
fi

# Check if template directory exists
if [ ! -d "$TEMPLATE_DIR" ]; then
  echo "Error: Template directory not found at $TEMPLATE_DIR"
  exit 1
fi

echo "Starting setup..."
echo "Creating Next.js app for Cloudflare Workers: $APP_NAME"

# Create destination directory
mkdir -p "$APP_NAME"
APP_PATH="$(cd "$APP_NAME" && pwd)"

# Copy template files
cp -r "$TEMPLATE_DIR/"* "$APP_PATH/"

pushd $APP_NAME > /dev/null
# Update project name in various files
sed -i "s/next-cloudflare-template/$APP_NAME/g" "package.json"
sed -i "s/next-cloudflare-template/$APP_NAME/g" "wrangler.toml"

# Install dependencies
echo "Installing dependencies..."
pnpm install > /dev/null 2>&1
echo "Initializing git repository..."
wrangler d1 execute DB --local --file=migrations/0001_initial.sql > /dev/null 2>&1
git init > /dev/null 2>&10
git add . > /dev/null 2>&1
git commit -m "init" > /dev/null 2>&1
popd > /dev/null


echo "Created new Next.js app $APP_NAME at $APP_PATH"
echo
echo "=== Project Structure ==="
echo "├── migrations/              # D1 database migration files"
echo "│   └── 0001_initial.sql    # Initialize database tables"
echo "├── src/"
echo "│   ├── app/                # Next.js pages"
echo "│   │   └── counter.ts      # Server operation examples"
echo "│   ├── components/"
echo "│   ├── hooks/"
echo "│   └── lib/"
echo "└── wrangler.toml           # Cloudflare configuration"
echo
echo "=== D1 Database Operations Guide ==="
echo "1. Local development database config (wrangler.toml):"
echo "   [[d1_databases]]"
echo "   binding = \"DB\"                # Environment variable name"
echo "   database_name = \"local-db\"    # Database name"
echo "   database_id = \"local\"         # ID for local development"
echo
echo "2. Execute SQL file to reset database:"
echo "   wrangler d1 execute DB --local --file=migrations/0001_initial.sql"
echo
echo "3. Apply new migrations:"
echo "   wrangler d1 migrations apply DB --local"
echo
echo "Example counter.ts demonstrates how to:"
echo "- Insert and update counters"
echo "- Record access logs"
echo "- Query recent access records"
echo
echo "Tip: To reset local database, simply rm -rf .wrangler/state/v3 and re-execute SQL file"
echo "Happy coding! 🚀"